Pen



Patented Feb. 27, 1923.

UNITED as P TE ROBERT JAMES ESTES, COALGATE, OKLAHOMA.

rmr.

. Application filed August 22, 1922. Serial No. 583,549.

To all whom it may concern:

Be it known that I, ROBERT J. ESTES, a

citizen of the United States of America, and

a resident of Coalgate, in the county of Coal and State of Oklahoma, have invented a new and Improved Pen, of which the following is a description.

My invention relates to writing pens and particularly to a writing pen employing a stylus. 4 i

The general object of my invention is to provide a 'pen of-the indicated type improved in various particulars with respect to the feed means and the regulating means therefor.

The nature of my invention and its distinguishing features and characteristics will appear clearly as the description proceeds.

Reference is to be had to the accompanying drawings forming a. part of this specification, it being understood that the drawings are merely illustrative of one example of the invention.

Figure 1 is a side elevation of a pen embodying my invention;

Figure 2-is a vertical section, part of the staff being in elevation;

Figures 3 and 4 are cross sections respectively on the lines 3-3 and 44 of Figure 2.

In carrying out my invention in accordance with the illustrated example, a staff 10 is formed at the front end with an axial blind bore or recess 11 of square or other non-circular form. The axle of the recess 11 receives a shank 12 0' a stylus 13, said shank having a square or other non-circular cross section to conform to said recess to prevent the stylus from turning about its own axis in the staff 10,

and formed with a twist or helical convolutions, the grooves of the helical convolutions increasing in size rearwardly from the Writing point; I -The tapered end 17 of the stylus is adapted to be protruded beyond the front of the oap' l6 for writing and in order to regulate the feed of the ink the cap 16 is provided with a rubber disk 18 having a central hole. for thepassage of the stylus point. The disk 18 is clamped in place between the front flange 19 on the cap 16 and a Washer 20 in the cap 16 at the back of said disk 18.

The disk 18functions in re ulat-ing the flow of the ink along'the helical grooves presented by the tapered end 17 ofthe stylus. The stylus may be projected more or less beyond the end of thecap 16 by turning the staff 10 since with the turning of said staff the recess 11 and square shank 12 cause the stylus 13 to be turned also, so that the" engagement of thethreads 14 of the stylus with the threads of the partition'lf) causes the stylusto be advanced or retracted and thereby, owing to the tapered end 17 a greater or less spacefor ink' flow will be afforded between the exterior of said tapered portion and the rubber disk 18.

As an aid to hold a supply of ink I proi vide a wire mesh sleeve 21 withinthe cap 16 in front of the partition 15 and terminating adjacent to the washer 20 that clamps the rubber feed disk 18, said cap 16 having ample'openings 22 at the sides thereof to afford ent ance of ink to said mesh sleeve 21.

I would state in conclusion that while the illustrated example constitutes a practical embodiment of my invention, I do not limit myself strictly to the exact details herein illustrated, since, manifestly, the same can be considerably varied without departure from the spirit of the invention as defined in the appended claims.

Having thus described my invention, I claim f 1. A writing pen including a stylus having a tapered front end, an element with which said stylus has threaded engagement, feed control means through which the tapered portion of the stylus may be projected, a turnable pen staff, and means toturn the stylus by the turning of said staff.

2. A pen including a stylus having a tapered front end presenting spiral convolutions, said stylus being adjustable longitudinally, and means adjacent the said tapered portion through which said: tapered portion may be variously projected by the longitudinal movement of the stylus.

3. A pen including a stafi', a cap thereon, a stylus disposed axially in said;cap and formed With a front end tapering and presenting helical grooves, said staff being turnable relatively to the cap and said stylus at its rear end having engagement with the staff to move longitudinally therein but to he turned by the turning of the staff, and feed control means on the cap at the front end through whieh the tapered portion of the stylus may be variously projected.

4. A 'pen including a staff, a cap thereon, a stylus disposed axially in said cap, and ta pered at its front end, said staff being turnable relatively to the cap and said stylus at its rear end having having engagement with the staff to move longitudinally therein but to be turned by the turning of the staff, and feed control means on the cap at the front end through which the tapered portion of the stylus may be variously projected.

5. A writin pen including a stylus having a tapered front portion, and arubber disk transverse to said tapered portion and through which said tapered portion may be variously projected.

(3. A writing pen including a stylus having a tapered front portion presenting helical grooves, and a rubber disk transverse to saidtapered portion and through which said tapered portion may be variously projected. '4'. A writing pen including a stafi, a cap on the said staff presenting side openings, a

sleeve of wire mesh within the cap at said openings, feed control means at the front end of the cap, and a stylus disposed axially in the cap and adjustable therein to variously project the stylus through said feed control means.

8. A pen including a staff, a cap thereon presenting side openings, a sleeve of wlre mesh within the cap at said openings, a rubber disk on the cap at the front end, a stylus having a tapered front end presenting a helical groove, and means to adjust the stylus longitudinally to variously project its said tapered portion through said disk.

RQBERT JAMES ESTES.- 

